Choosing the right scope mount for your AR-15 is crucial for accuracy and functionality. But what if you want to retain the option of using your iron sights? This is a common dilemma for AR-15 owners, and thankfully, there are several excellent solutions available. This guide will explore the various types of AR-15 scope mounts that allow you to maintain the utility of your iron sights, along with factors to consider when making your selection.
Understanding the Importance of Co-Witnessing
The key term to understand here is co-witnessing. This refers to the ability to see both your scope's reticle and your iron sights simultaneously. There are two main types of co-witnessing:
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Absolute Co-witness: Your iron sights are perfectly aligned with the scope's reticle. This provides a clear, unobstructed view of both, ensuring a smooth transition if your scope malfunctions or is unusable.
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Lower 1/3 Co-witness: Your iron sights sit below the scope's reticle. You'll see the top of your front sight post just below the reticle. This setup is preferred by many as it offers a more compact overall sight picture, particularly useful in close-quarters scenarios.
Types of AR-15 Scope Mounts with Iron Sight Capability
Several mount types offer co-witnessing capabilities. The most popular are:
1. Standard AR-15 Mounts with Different Heights
Many standard AR-15 scope mounts come in varying heights. By selecting a lower-profile mount, you can achieve lower 1/3 co-witnessing. Higher mounts, while offering more eye relief, usually obscure your iron sights completely. Carefully check the specifications of the mount to ensure it's compatible with your desired co-witnessing setup and scope.
2. Offset Scope Mounts
These mounts position the scope to the side of the receiver, allowing the shooter to use iron sights without interference. While offering a unique solution, offset mounts can present challenges in terms of cheek weld and potentially affect your overall shooting form. This is often less favored compared to absolute or lower 1/3 co-witness.
3. Flip-to-Side Mounts
These innovative mounts allow you to quickly and easily flip your scope to the side, providing immediate access to your iron sights. This offers the ultimate flexibility, but they tend to be more expensive and add some bulk to your rifle.
Factors to Consider When Choosing Your Mount
Beyond co-witnessing, several factors influence your choice:
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Scope Height and Weight: A heavier scope requires a more robust mount. Ensure your chosen mount can handle the combined weight without bending or failing.
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Ring Size: Make sure the rings are compatible with your scope's tube diameter.
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Material: Most high-quality mounts are constructed from aluminum alloy (6061-T6 is a common choice) for durability and lightweight performance. Steel mounts are also available, offering greater strength but often significantly more weight.
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Return-to-Zero (RTZ) Capability: Some mounts feature mechanisms ensuring your scope returns to its zero point after being removed and reinstalled. This is a valuable feature for frequent adjustments.
Conclusion: Choosing the Right AR-15 Scope Mount
Choosing the right AR-15 scope mount that maintains iron sight functionality is a matter of careful consideration of your specific needs and preferences. By understanding the concepts of co-witnessing, the available mount types, and the key factors discussed above, you can make an informed decision and enhance your shooting experience. Remember to always prioritize safety and ensure proper installation and zeroing of both your scope and iron sights.
